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START
Generate on Ext_conn. the correct Freq.
and Level. Put Pcb in Test mode,
digit 9820# and 450700# for
DCS, 9822# and 450661# for PCS.
Is it only DCS problem ?
Is it only PCS
problem ?
Are correct the RVCO_PCS and
RVCO_DCS on pin 6 and 4 of
U400 ?
Is there the correct signal on
C1402 ?
( for DCS CH = 1842.8 Mhz )
( for PCS CH = 1960 Mhz )
Is there the correct
signal on C1405 ?
Is there the correct
signal on C2452 ?
Is there the correct
signal (400Mhz) on
C460 ?
Check for intermittent
problem.
mercoledì, gennaio 24, 2001
GPRS Tri Band T260 Level 3 procedure
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NOTE1 : check if any components mentioned are
correctly positioned , have not dry joint and aren't
- MOTOROLA Level3 Authorized -
Check FL1400 then
U150 and U151 NOTE1
or Faulty.
If they are OK go to Q
on pg.7
Check FL2400 then
U150 and U151 NOTE1
or Faulty.
If they are OK go to Q
on pg.7
Check U400
measuring the resistance between pin 4 and
pin 6 of U400 to Ground.
(remove power supply)
If they are OK GO TO L on pg.12
otherwise replace U400.
Check U400 NOTE1 or
Faulty.
Check the presence of RX275_DPCS
on collector of Q1400.
P
If NOT OK GO TO
If OK Check Q1400 NOTE1 or Faulty.
Check FL1401 NOTE1
or Faulty.
Check the presence of RX275 on pin 3 of Q450 and the
RX_275_DPCS on L2450 (about 1,2 Volt).
If NOT OK GO TO
If OK check Q450 NOTE1 or Faulty.
not phisically damaged .
Rev.1
For most of Signals Use a
Test PCB as reference.
(these signals must change their
value, depend on chanel selected)
T260:
NO RX DCS/PCS mode
on pg.6.
P
on pg.6.
pag.5
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